I worked on a high frequency mm desk at a bank and then at a HFT firm and never heard “toxic order flow” used to mean this. “Toxic order flow” is when other HFTs cross the spread to hit your limit orders faster than you can pull them (eg because you are both reacting to
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Just look at all this very toxic, one-sided retail order flow.pic.twitter.com/FNJ15gWWpL
End of conversation
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